A positioning pin is knocked onto a crankshaft of an engine and a key way is formed in a boss of a first flywheel. When an outer rotor type generator is connected with the engine, the boss of the first flywheel is fitted over the crankshaft so as to adjust the positioning pin to the key

In each of the soundproofed engine generators, the position at which the power generator body is coupled to the crank shaft is located at the end part on the crank shaft. In the soundproofed engine generator of the inverter type, the inverter unit is opposed to the power generator body a

In a gas-liquid separation device in a vibrator engine according to the present invention, a crank chamber and a rocker chamber communicate with each other through an oil delivery passage, and a push rod chamber and the crank chamber communicate with each other through an oil chamber and

An engine generator having an engine unit and generator are accommodated in a noise insulation case with a crankshaft oriented in a widthwise direction of the noise insulation case. An air cleaner is disposed at the front end of the noise insulation case and a muffler is disposed at the